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authorRoland McGrath <roland@redhat.com>2008-01-30 07:30:40 -0500
committerIngo Molnar <mingo@elte.hu>2008-01-30 07:30:40 -0500
commit5b93049337301d6fbd3cf55db99b34e6b0dbd3a3 (patch)
tree69e42bddac98aff8035f03a36fc88030a7f2a902 /arch/x86/vdso/Makefile
parentc1d171a002942ea2d93b4fbd0c9583c56fce0772 (diff)
x86 vDSO: generate vdso-syms.lds
This patch adds a new way of extracting symbols from the built vDSO image. This is much simpler and less fragile than using ld -R; it removes the need to control the DSO layout quite so exactly. I was clearly unduly distracted by clever ld uses when I did the original vDSO implementation. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/vdso/Makefile')
-rw-r--r--arch/x86/vdso/Makefile14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index e7bff0fbac23..d8200adae9fa 100644
--- a/arch/x86/vdso/Makefile
+++ b/arch/x86/vdso/Makefile
@@ -55,6 +55,20 @@ SYSCFLAGS_vdso-syms.o = -r -d
55$(obj)/vdso-syms.o: $(src)/vdso.lds $(vobjs) FORCE 55$(obj)/vdso-syms.o: $(src)/vdso.lds $(vobjs) FORCE
56 $(call if_changed,syscall) 56 $(call if_changed,syscall)
57 57
58targets += vdso-syms.lds
59obj-y += vdso-syms.lds
60
61#
62# Match symbols in the DSO that look like VDSO*; produce a file of constants.
63#
64sed-vdsosym := -e 's/^00*/0/' \
65 -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p'
66quiet_cmd_vdsosym = VDSOSYM $@
67 cmd_vdsosym = $(NM) $< | sed -n $(sed-vdsosym) | LC_ALL=C sort > $@
68
69$(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE
70 $(call if_changed,vdsosym)
71
58quiet_cmd_vdso_install = INSTALL $@ 72quiet_cmd_vdso_install = INSTALL $@
59 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 73 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
60vdso.so: 74vdso.so: